especially in times of EU-GDPR–DSGVO but also for the user’s privacy effectively shredding data is important.
if the admin-user wants to wipe-shred-secure-delete entire harddisks look at this article.
GNU Linux Debian 10 can do that 🙂
update: 2024: want to resell harddisk? shred it many many times for example with the help of this shred_harddisk_with_logs.sh “secure & fast wipe and refurbishment harddisk script v1.1 by dwaves.org GPLv2” script! 🙂
# install software # deb based hostnamectl; # tested on Operating System: Debian GNU/Linux 10 (buster) Kernel: Linux 4.19.0-14-amd64 Architecture: x86-64 apt install zip secure-delete # rpm based hostnamectl; # tested on Operating System: CentOS Linux 8 CPE OS Name: cpe:/o:centos:centos:8 Kernel: Linux 4.18.0-240.10.1.el8_3.x86_64 Architecture: x86-64 yum install zip srm.x86_64 # encrypt all files also filenames (good idea to also encrypt meta info too) # warning! name the folder or file.zip to encrypt something random ! X-D FILENAME=$RANDOM mv -v /folder/to/encrypt /folder/to/$FILENAME zip -r $FILENAME.zip /folder/to/$FILENAME # OUTPUT-FILE INPUT-FILE zip -e $FILENAME.encrypted.zip $FILENAME.zip lsb_release -a; # tested on No LSB modules are available. Distributor ID: Debian Description: Debian GNU/Linux 10 (buster) Release: 10 Codename: buster apt install wipe wipe * Yes? # type Yes hit Enter ... overwrite 34x passes with zeros # pretty fast :) # srm is complaining about "HARDLINKED" files for whatever reason # then shred the unencrypted version of the file # default mode: overwrite with 38x passes of random (recommended unless it is really not possible) srm -vr /folder/to/$FILENAME srm -vr $FILENAME.zip # minimum paranoia: overwrite with 1x pass of random srm -rfllv /folder/to/$FILENAME srm -rfllv $FILENAME.zip
related manpages:
can only do files:
GNU Linux – automatic harddisk wipe secure delete erase script with dd
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